"I didn't need to speak. I could lay thoughts out in his mind like they were a sheet."
Ada says this to Flora, her daughter who asks her how she spoke to him. Ada tells her this as their relationship was one that did not need words, it was much deeper than that.
"For silence affects everyone in the end."
Ada says this in a narration at the beginning of the film. People wonder why she cannot talk or how she can bear the silence, but from her silence she knows that everyone in some way must bear it in whatever form it comes.
"Might I suggest that you prepare yourself for a difficult journey."
Stewart says this to Ada after picking her up from the sea shore. He is being quite literal about their walk to his home, but it also is an implication of the story that is to unfold for her in this new place.